Fix SQL detection

[grcevski]

Our existing SQL heuristic was too lenient, we weren't detecting any specific protocols, but were simply searching for SQL text in the output. The simple heuristic is easy to defeat if we have a process that sends SQL like text in for example logs.

To fix this I added support for specific detection for MySQL and Postgres, while everything else will not be detected by default unless the user manually enables the SQL heuristic. This change doesn't affect Go, only protocol level detection.

While testing MySQL I also detected a few problems with HTTP calling to TLS enabled TCP requests. I've also fixed these in this PR. Mainly the issue was that related to SSL_write, where those Uprobes run before tcp_sendmsg. Therefore we were getting the connection information for the HTTP request and not the outgoing SSL write. This led to number of problems.

TODO:

• Docs on the new option and the default behaviour

Closes #1422

[codecov]

Codecov Report

Attention: Patch coverage is 81.55340% with 38 lines in your changes missing coverage. Please review.

Project coverage is 80.89%. Comparing base (f517939) to head (ac119b9).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/internal/ebpf/common/sql_detect_postgres.go	78.26%	19 Missing and 6 partials ⚠️
pkg/internal/ebpf/common/sql_detect_mysql.go	79.54%	6 Missing and 3 partials ⚠️
pkg/internal/ebpf/common/tcp_detect_transform.go	62.50%	2 Missing and 1 partial ⚠️
pkg/internal/request/span_getters.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1427      +/-   ##
==========================================
- Coverage   81.02%   80.89%   -0.14%     
==========================================
  Files         147      149       +2     
  Lines       15033    15117      +84     
==========================================
+ Hits        12181    12229      +48     
- Misses       2260     2288      +28     
- Partials      592      600       +8     

Flag	Coverage Δ
integration-test	59.08% <30.09%> (-0.13%)	⬇️
k8s-integration-test	59.27% <1.94%> (-0.26%)	⬇️
oats-test	33.57% <34.46%> (-0.17%)	⬇️
unittests	51.75% <77.18%> (+0.14%)	⬆️

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